GeForce GTX 1080 vs GeForce GTX 850M

Intro

Compare those specifications to the GeForce GTX 850M, which comes with GPU clock speed of 876 MHz, and 2048 MB of DDR3 RAM set to run at 1000 MHz through a 128-bit bus. It also is comprised of 640 SPUs, 40 Texture Address Units, and 16 Raster Operation Units.

Display Graphs

Hide Graphs

Benchmarks

These are real-world performance benchmarks that were submitted by Hardware Compare users. The scores seen here are the average of all benchmarks submitted for each respective test and hardware.

3DMark Fire Strike Graphics Score

GeForce GTX 1080		21942 points
GeForce GTX 850M		3340 points
	Difference: 18602 (557%)

Zcash Mining Hash Rate

GeForce GTX 1080		553 Sol/s
GeForce GTX 850M		49 Sol/s
	Difference: 504 (1029%)

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTX 850M		40 Watts
GeForce GTX 1080		180 Watts
	Difference: 140 Watts (350%)

Memory Bandwidth

Theoretically speaking, the GeForce GTX 1080 should be 924% quicker than the GeForce GTX 850M overall, because of its higher bandwidth. (explain)

GeForce GTX 1080		327680 MB/sec
GeForce GTX 850M		32000 MB/sec
	Difference: 295680 (924%)

Texel Rate

The GeForce GTX 1080 should be a lot (approximately 634%) better at anisotropic filtering than the GeForce GTX 850M. (explain)

GeForce GTX 1080		257120 Mtexels/sec
GeForce GTX 850M		35040 Mtexels/sec
	Difference: 222080 (634%)

Pixel Rate

If running with lots of anti-aliasing is important to you, then the GeForce GTX 1080 is a better choice, and very much so. (explain)

GeForce GTX 1080		102848 Mpixels/sec
GeForce GTX 850M		14016 Mpixels/sec
	Difference: 88832 (634%)

Please note that the above 'benchmarks' are all just theoretical - the results were calculated based on the card's specifications, and real-world performance may (and probably will) vary at least a bit.

Price Comparison

Specifications

Memory Bandwidth: Memory bandwidth is the maximum amount of information (measured in megabytes per second) that can be transported past the external memory interface in a second. The number is calculated by multiplying the interface width by the speed of its memory. In the case of DDR RAM, it should be multiplied by 2 once again. If it uses DDR5, multiply by 4 instead. The better the memory bandwidth, the faster the card will be in general. It especially helps with anti-aliasing, High Dynamic Range and high resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that can be applied in one second. This figure is worked out by multiplying the total amount of texture units of the card by the core clock speed of the chip. The higher this number, the better the graphics card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels per second.

Pixel Rate: Pixel rate is the maximum amount of pixels that the graphics card can possibly record to its local memory per second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the amount of Raster Operations Pipelines by the clock speed of the card. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel rate is also dependant on quite a few other factors, especially the memory bandwidth of the card - the lower the bandwidth is, the lower the potential to reach the max fill rate.